Point 1 Response: I again want to ask, how and what exactly do you mean by, "Brawl's basically just become how to beat MK and Snake to a lesser extent?" Do you mean that's what's talked about the most in individual character board? Do you mean that's what people spend their most time doing at in person tournaments? Do you mean that's why character boards constantly look to propel their metagame and find new usages for the tools they already possess? What do you mean, "The game has turned into how to beat MK?"
For a week at a character board and during these, "lol ban MK" threads are the only times where the community is that focused on the MK match-up as a whole. Saying that's what all Brawl has become is just a statement that I can't believe because there's no proof behind it, and I have not seen it.
Point 2 Response: Okay.
Point 3 Response: Alright. However, being unable to put a permanent advantage on=/=breaks the CP system. If it's your CP, you can CP him to Halberd and go Snake, or FD and go Diddy/ICs, or Battlefield and go ICs, Even if whatever you CP him to isn't on paper your advantage, you're still able to put yourself into a better advantage that is at least even.
Point 4 Response: Refer to 3. You can counterpick MK on your counterpick, or at least get to even. There weren't really qualms with this in Melee with Fox having no consistent disadvantageous match-up. A retort will probably be something along the lines of, "They're different games with different mechanics!" True. But still, a character with no consistent bad match-ups existed, and the CP system and metagame didn't fall apart.
What you mentioned about Wario and Snake are match-up specific. Just because characters can infinite Wario doesn't mean he loses the match-ups. Just because people can juggle Snake doesn't mean he loses the match-ups where he gets juggled. I don't understand why you brought that up.
Point 5 Response: How is it obvious? When I say MK dominating mid-levels of play, I meant tournament results proving this. My part 6 response was trying to show that there are instances in mid levels of play where MKs lose, and somewhat frequently. I don't see why he'd be harder to manage at a mid-level of play. Match-up specifically, maybe, but as far as tournament results go, we don't see MK always taking the 30-40 person tournaments, which was what I was trying to explain.
Point 6 Response: See above. It wasn't to say, "Look, these people beat MK at a mid-level, ergo he's not a problem." I was trying to put in evidence via tournament results by saying that mid-level MKs get frequently beaten just as much as anyone else.
Point 7 Response: I thought Azen quit smash in general. Also, they don't really have to be known players, I guess saying tournament attending players would have been better. Most of the people who quit Brawl for Brawl+ or BBrawl quit because they didn't like the game Brawl in general, not specifically because of Meta Knight. I can't think of any people who quit the entire game specifically because of Meta Knight. I'm sure there might be some, but there's also the people who quit Brawl because of the infinites, or the lack of a common tech-skill layer, or the fact that BlazBlue came out and they wanted to play that more, etc.
Point 8 Response: lolllwuttttthurrr.
Makes unviable: Toon Link, in that list. Pikachu? Lolwut. MK isn't that bad of a match-up for Pikachu. He makes R.O.B. less viable if only because ZSS destroys him harder. Same with Olimar and Peach. Pit I honestly don't know about. Add Peach to this list.
Makes less viable: R.O.B., Marth. Game and Watch. Ice Climbers is just wrong, considering that they're one of the characters people speculate to go even with him.
Point 9 Response: My statement that, "It assumes that counterpicking characters is often used at high and even mid levels of play" wasn't really disproven, and was just worded around. Sure, MK is unique in the game in that you can't have a universal character counterpick against him, but you can still counterpick him, and given that in mid and high levels of play, the character counterpick system isn't used much, then it's a lot less important than many are making it sound.
Point 1. To put it simply, if you dig around each of the character boards, beating Metaknight is the main concern of most of them. For example, Ike's worst match up is Olimar but, all in all, the number of Metaknight players dwarfs the number of Olimar players. This is why Metaknight is a bigger concern for ROB players than ZSS. This is why Diddy players usually care more about Metaknight than Peach players. This is why Mr. Game and Watch players care more about Metaknight players than Toon Link players. Aside from a few characters like Wario (who really doesn't fear anybody anymore, truth be told

) and Donkey Kong, this is how it is.
So I don't have to explain it in a later point, that's why ROB is kept from becoming viable more so by Metaknight than ZSS. Much fewer people play as ZSS and, off the top of my head, Snakee is the only really noteworthy one. Also, ZSS has one of the highest learning curves of the whole cast and she's okay against other high characters so it's very unlikely that a huge surge of people would suddenly pick her up just to counter ROB.
Point 2. Ness: Okay.
Point 3. For Brawl, I say it does given how much fewer factors decide a match up than, say, a game like Melee. They say that the first match is the most important for a set so depending on a "couterpick" that simply makes the match up even afterwords, simply refutes itself the next match when the Metaknight can counterpick a stage that puts the match back in his favor. I mean, look at Donkey Kong vs King Dedede. Some people argue that, if it wasn't for the infinite, the match up would be close to even and the same is said about Bowser vs King Dedede. These are match ups are that are pretty much decided by one thing and, in a sense, a lot of people who are bad against Metaknight are like this. Falco does fine against Metaknight... until he planks. ROB does okay... until Metaknight gets him in the air. Olimar does fine agianst Metaknight... until Metaknight gets him offstage.
Point 4. Only because Fox didn't run away with tournaments. At the peak of Melee's metagame, wasn't Marth the highest ranked character? Regardless, as I said before, the game was more "balanced" if not only in the sense that there wasn't a freakishly huge gap between the best characters like there is in Brawl. Heck, the two best players, Ken and Isai, didn't even used the two best characters in the game. Ken used Marth and Isai used Captain Falcon. Also, Fox's meer presence didn't drag down the top/high tier like Metaknight does with Brawl. Fox had simpler methods that made the match up more managable like Dr. Mario's uthrow and Jigglypuff's "Spacey killer." In Melee, Fox making a mistake could result in him losing a stock in the right hands. Fox didn't have five methods of recovery and with the shine could only theorically negate every attack in the game. With this being said, the only character that ever come close to being like Metaknight is Shiek and even then it was discovered within a year how to kick her down a notch (and Link too to a much stronger degree). Obviously, despite many promises from the anti-ban side, this has yet to happen and Metaknight is still the run away dominant character.
Point 5. As explained in the past, Metaknight doesn't have to win all the tournaments in order to be the best. As the Amazing Ampharos showed in his post of all the major tournament placings this year, Metaknight and Snake were tied with first place winnings but Metaknight still had triple the placings of Snake who in turn had double the placings of the third place character (I think it was Diddy, I don't fully remember). Again, the gap between Metaknight and the rest of the cast is still bonkers (wait... did I just say bonkers?

) despite more than a year passing since Metaknight overtook Snake and it definately doesn't help that no major discoveries have been made in quite some time. Like mentioned in point four, things were discovered at a slower rate for Melee because it was a smaller community but even then, finding a way of defeat Shiek was found faster than it has been for Metaknight and that was back in like 2002/2003. When viewed like this, it more than shows that things aren't going to change that much with Metaknight despite people being optimistic that a counter will eventually emerge.
Point 6. Well isn't it all the same then in that regard? From what I gather, I said that Metaknight is dominant in both but more so in mid-level play but you are saying that he's about the same in both?
Point 7. I read what you said and what Goodoldganon said but, as said before, aside from Metaknight, all the gay stuff in Brawl can be counterpicked against and, when it comes to the mid/low tiers, it's about the same as Melee except they definately had more options against the higher tiers (although some of them were just as screwed in the long run). In a way, everything else can be reasonably dealt with via counterpicking.
Point 8. Toon Link does fairly well against the high tiers overall and is even a counter to Mr. Game and Watch and some would argue even Diddy Kong. If anything, he is a character who I've been the most impressed by his growth this year and what Santi has been able to do with him.
Pikachu's similar to Toon Link in that regard too. When played right, he can counter Snake, he's a big nusance to King Dedede, he does fairly well against Marth, Ice Climbers, Diddy Kong, ROB, and Falco. Overall, the only other high tier character he does bad against is Mr. Game and Watch.
I already explained ROB back in point one.
Olimar's argued to be to be a Snake counter in the right conditions, he's one of King Dedede's worst matchups, he does fairly well against Falco, Wario, Diddy, Marth, etc. His worst matchups aren't even high tier characters. His worst match ups are Luigi and Peach but, as said before, Metaknight might as well be first since the number of esteemed Luigi and Peach is a fraction of the number of Metaknight players out there. (Come to think of it, theBoss8 and Edress are the only major Luigi/Peach players I know.)
Aside from Metaknight and Mr. Game and Watch (Metaknight being worse and Mr. Game and Watch being managable if Pit doesn't go crazy with the arrows), Pit does pretty well against the top/high tiers. Unfortunately, he only has one major player backing him up (Sagemoon) so his tournament rankings are garbage at the moment.
I have a hard time agreeing with Peach. VS Metaknight is garbage, obviously, but Mr. Game and Watch and Marth are sometimes argued to be just as bad. Snake seems rough seeing how Snake's utilt wrecks her floating game and his ftilt wrecks her approaches. Hmm... On the other hand, Peach does have the Dthrow pseudo chain grab on him and can basically make him her little plaything if she can get him in the air or caught in a floating dair... Tough call... She beats Olimar and Diddy Kong but kind of has it hard against Falco and King Dedede. Oh, I almost forgot, she does have the "careless" infinite against Wario but, ideally, Wario shouldn't be grabbed and the match up isn't bad for him either aside from that.
Regarding the Ice Climbers, there are some stages that make it royally hard for them against Metaknight like Rainbow Cruise so I still say it would take a big weight off their shoulders considering how they counter King Dedede and can counter Snake if they don't go crazy with chain grabs and be aware of when Snake uses grenades. They may be hurt overall if the number of ROB players increase but, as I mentioned in another post, I seriously doubt that certain characters would be popular across all regions if Metaknight got the boot.
Point 9. Addressed in 3, 4, and 5 (again).